Well I have a good one to relate which at the time almost did me in. In October one year I was in Minnesota and had to drive a big U'Haul to Nevada full of stuff, furniture and boxes etc. I had driven the route many times by car, thought I had a handle on things. One cold blustering snowy morning I found myself approaching the pass in Colorado and had to drive over it to get to the other side. Ever done that. A heavy truck going up. so slow and jerky then all of a sudden a missile flying down the steep hill, riding the brake all the way, white knuckled and crying terrified of going over the sheer cliff on the right or hitting a car sailing by on the left. It was the worst thing bar none I have ever experienced and at the bottom as soon as I saw a placed to stop I did and the woman in the gas station wanted to call an ambulance for me I was hyperventilating so badly.... Never again, no trucks (on mountains) for me not even as a passenger.